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Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models. (2023)
Journal Article
Claret, A., & Southworth, J. (2023). Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models. Astronomy & Astrophysics, 674, Article A63. https://doi.org/10.1051/0004-6361/202346478

Context. The phenomenon of limb-darkening is relevant to many topics in astrophysics, including the analysis of light curves of eclipsing binaries, optical interferometry, measurement of stellar diameters, line profiles of rotating stars, gravitation... Read More about Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models..

High-mass eclipsing binaries: A testbed for models of interior structure and evolution Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen??? (2023)
Journal Article
Pavlovski, K., Southworth, J., Tkachenko, A., Van Reeth, T., & Tamajo, E. (2023). High-mass eclipsing binaries: A testbed for models of interior structure and evolution Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen???. Astronomy & Astrophysics, 671, Article A139. https://doi.org/10.1051/0004-6361/202244980

Aims: The surface chemical compositions of stars are affected by physical processes that bring the products of thermonuclear burning to the surface. Despite their potential in helping us understand the structure and evolution of stars, elemental abun... Read More about High-mass eclipsing binaries: A testbed for models of interior structure and evolution Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen???.

Tidally perturbed gravity-mode pulsations in a sample of close eclipsing binaries (2023)
Journal Article
Van Reeth, T., Johnston, C., Southworth, J., Fuller, J., Bowman, D., Poniatowski, L., & Van Beeck, J. (2023). Tidally perturbed gravity-mode pulsations in a sample of close eclipsing binaries. Astronomy & Astrophysics, 671, Article A121. https://doi.org/10.1051/0004-6361/202245460

Context. Thanks to the high-precision photometry from space missions such as Kepler and TESS, tidal perturbations and tilting of pulsations have been detected in more than a dozen binary systems. However, only two of these were gravity-mode (g-mode)... Read More about Tidally perturbed gravity-mode pulsations in a sample of close eclipsing binaries.

A precise blue-optical transmission spectrum from the ground: evidence for haze in the atmosphere of WASP-74b (2023)
Journal Article
Spyratos, P., Nikolov, N. K., Constantinou, S., Southworth, J., Madhusudhan, N., Sedaghati, E., …Mancini, L. (2023). A precise blue-optical transmission spectrum from the ground: evidence for haze in the atmosphere of WASP-74b. Monthly Notices of the Royal Astronomical Society, 521(2), 2163 - 2180. https://doi.org/10.1093/mnras/stad637

We report transmission spectroscopy of the bloated hot Jupiter WASP-74b in the wavelength range from 4000 to 6200 Å. We observe two transit events with the Very Large Telescope (VLT) Focal Reducer and Spectrograph and present a new method to measure... Read More about A precise blue-optical transmission spectrum from the ground: evidence for haze in the atmosphere of WASP-74b.

Revising the properties of low mass eclipsing binary stars using TESS light curves (2023)
Journal Article
Jennings, Z., Southworth, J., Maxted, P. F. L., & Mancini, L. (2023). Revising the properties of low mass eclipsing binary stars using TESS light curves. Monthly Notices of the Royal Astronomical Society, 521(3), 3405-3420. https://doi.org/10.1093/mnras/stad519

Precise measurements of stellar parameters are required in order to develop our theoretical understanding of stellar structure. These measurements enable errors and uncertainties to be quantified in theoretical models and constrain the physical inter... Read More about Revising the properties of low mass eclipsing binary stars using TESS light curves.

Transit timing variation analysis of the low-mass brown dwarf KELT-1 b (2023)
Journal Article
Baştürk, Ö., Taylor, J., Yalçınkaya, S., Mancini, L., Esmer, E., Tekin, M., …Yeşilyaprak, C. (2023). Transit timing variation analysis of the low-mass brown dwarf KELT-1 b. Monthly Notices of the Royal Astronomical Society, 521(1), 1200-1209. https://doi.org/10.1093/mnras/stad248

We investigate whether there is a variation in the orbital period of the short-period brown dwarf-mass KELT-1 b, which is one of the best candidates to observe orbital decay. We obtain 19 high-precision transit light curves of the target using six di... Read More about Transit timing variation analysis of the low-mass brown dwarf KELT-1 b.

Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM (2023)
Journal Article
Rustamkulov, Z., Sing, D. K., Mukherjee, S., May, E. M., Kirk, J., Schlawin, E., …Zieba, S. (2023). Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM. Nature, 614, 659–663. https://doi.org/10.1038/s41586-022-05677-y

Transmission spectroscopy1,2,3 of exoplanets has revealed signatures of water vapor, aerosols, and alkali metals in a few dozen exoplanet atmospheres4,5. However, these previous inferences with the Hubble and Spitzer Space Telescopes were hindered by... Read More about Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM.

δ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642 (2022)
Journal Article
Southworth, J., Murphy, S. J., & Pavlovski, K. (2022). δ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642. Monthly Notices of the Royal Astronomical Society: Letters, 520(1), L53-L57. https://doi.org/10.1093/mnrasl/slad004

We announce the discovery of pulsations in HD?23642, the only bright eclipsing system in the Pleiades, based on light curves from the Transiting Exoplanet Survey Satellite (TESS). We measure 46 pulsation frequencies and attribute them to d?Scuti puls... Read More about δ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642.

VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM (2022)
Journal Article
Southworth, J., Mancini, L., Dominik, M., Jørgensen, U., Bozza, V., Burgdorf, M., …Snodgrass, C. (2022). VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM. Observatory, 142, 220 - 229

TRAPPIST-1 is an ultra-cool dwarf that hosts seven known transiting planets. We present photometry of the system obtained using three telescopes at ESO La Silla (the Danish 1.54 m telescope and the 2.2 m MPI telescope) and Paranal (Unit Telescope 1 o... Read More about VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM.

Fundamental effective temperature measurements for eclipsing binary stars – II. The detached F-type eclipsing binary CPD-54 810 (2022)
Journal Article
Miller, N. J., Maxted, P. F. L., Graczyk, D., Tan, T. G., & Southworth, J. (2022). Fundamental effective temperature measurements for eclipsing binary stars – II. The detached F-type eclipsing binary CPD-54 810. Monthly Notices of the Royal Astronomical Society, 517(4), 5129-5143. https://doi.org/10.1093/mnras/stac2968

CPD-54 810 is a double-lined detached eclipsing binary containing two mid-F type dwarfs on an eccentric 26-d orbit. We perform a combined analysis of the extensive photometry obtained by the TESS space mission along with previously published observat... Read More about Fundamental effective temperature measurements for eclipsing binary stars – II. The detached F-type eclipsing binary CPD-54 810.

Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data (2022)
Journal Article
Kumar Mannaday, V., Thakur, P., Southworth, J., Jiang, I., Sahu, D., Mancini, L., …Shlyapnikov, A. (2022). Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data. Astronomical Journal, 164(5), 1-20. https://doi.org/10.3847/1538-3881/ac91c2

We present and analyze 58 transit light curves of TrES-3b and 98 transit light curves of Qatar-1b, observed by the Transiting Exoplanet Survey Satellite, plus two transit light curves of Qatar-1b, observed by us, using a ground-based 1.23 m telescope... Read More about Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data.

Surface brightness-colour relations of dwarf stars from detached eclipsing binaries I. Calibrating sample (2022)
Journal Article
Graczyk, D., Pietrzynski, G., Galan, C., Southworth, J., Gieren, W., Kaluszynski, M., …Wielgorski, P. (2022). Surface brightness-colour relations of dwarf stars from detached eclipsing binaries I. Calibrating sample. Astronomy & Astrophysics, 666, 1-17. https://doi.org/10.1051/0004-6361/202244122

Aims. Surface brightness – colour relations (SBCRs) are very useful tools for predicting the angular diameters of stars. They offer the possibility to calculate very precise spectrophotometric distances by the eclipsing binary method or the Baade-Wes... Read More about Surface brightness-colour relations of dwarf stars from detached eclipsing binaries I. Calibrating sample.

Identification of carbon dioxide in an exoplanet atmosphere (2022)
Journal Article
Ahrer, E., Wheatley, P. J., Alderson, L., Wakeford, H. R., Grant, D., Batalha, N. M., …Zhang, X. (2022). Identification of carbon dioxide in an exoplanet atmosphere. Nature, 614, 649-652. https://doi.org/10.1038/s41586-022-05269-w

Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the metal enrichment (i.e., elements heavier than helium, also called "metallicity"), and thus... Read More about Identification of carbon dioxide in an exoplanet atmosphere.

The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems (2022)
Journal Article
Mancini, L., Esposito, M., Covino, E., Southworth, J., Poretti, E., Andreuzzi, G., …Piotto, G. (2022). The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems. Astronomy & Astrophysics, 664, Article A162. https://doi.org/10.1051/0004-6361/202243742

Context. The measurement of the spin-orbit alignment of hot Jupiters, including a range of orbital and physical properties, can provide information about the evolution of the orbits of this special class of giant planets.

Aims. We aim to refine th... Read More about The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems.

Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems (2022)
Journal Article
Claret, A., & Southworth, J. (2022). Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems. Astronomy & Astrophysics, 664, Article A128. https://doi.org/10.1051/0004-6361/202243827

Context. Limb darkening is an important stellar phenomenon and must be accounted for in the study of stellar spectra, eclipsing binaries, transiting planetary systems, and microlensing events. The power-2 limb-darkening law provides a good match to t... Read More about Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 10: THE PULSATING B-TYPE SYSTEM V1388 ORIONIS (2022)
Journal Article
Southworth, J., & Bowman, D. M. (2022). REDISCUSSION OF ECLIPSING BINARIES. PAPER 10: THE PULSATING B-TYPE SYSTEM V1388 ORIONIS. Observatory, 142, 161 - 173. https://doi.org/10.48550/arXiv.2205.08841+Focus+to+learn+more

V1388 Ori is an early-B type detached eclipsing binary whose physical properties have previously been measured from dedicated spectroscopy and a ground-based survey light curve. We reconsider the properties of the system using newly-available light c... Read More about REDISCUSSION OF ECLIPSING BINARIES. PAPER 10: THE PULSATING B-TYPE SYSTEM V1388 ORIONIS.

Four bright eclipsing binaries with γ Doradus pulsating components: CM Lac, MZ Lac, RX Dra, and V2077 Cyg (2022)
Journal Article
Southworth, J., & Van Reeth, T. (2022). Four bright eclipsing binaries with γ Doradus pulsating components: CM Lac, MZ Lac, RX Dra, and V2077 Cyg. Monthly Notices of the Royal Astronomical Society, 515(2), 2755-2765. https://doi.org/10.1093/mnras/stac1993

The study of pulsating stars in eclipsing binaries holds the promise of combining two different ways of measuring the physical properties of a star to obtain improved constraints on stellar theory. Gravity (g) mode pulsations such as those found in γ... Read More about Four bright eclipsing binaries with γ Doradus pulsating components: CM Lac, MZ Lac, RX Dra, and V2077 Cyg.

Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035 (2022)
Journal Article
Herald, A., Udalski, A., Bozza, V., Rota, P., Bond, I., Yee, J., …Pogge, R. (2022). Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035. Astronomy & Astrophysics, 663, Article A100. https://doi.org/10.1051/0004-6361/202243490

Context. Brown dwarfs are transition objects between stars and planets that are still poorly understood, for which several competing mechanisms have been proposed to describe their formation. Mass measurements are generally difficult to carry out for... Read More about Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035.